=== modified file 'umount'
--- umount	2017-12-12 10:11:12 +0000
+++ umount	2017-11-30 21:44:46 +0000
@@ -1,5 +1,5 @@
 #!/bin/zsh
-(($+xtrace)) && (($xtrace)) && set -x
+set -x
 awk -v RX="^${0:a:h}/" '$2 ~ RX {print $2}' /proc/mounts | sort -r | while IFS= read; do
 	umount $REPLY || exit $?
 done